Upper plate of a set of artificial teeth



June 15 1926. 1,589,173

P. HANKE UPPER PLATE OF A SET OF ARTIFICIAL TEETH Filed Oct. 30, 1925 Elvwamtoz; Pa 111 Ha n Wu 3391;; 71 i s abliovnw Patented June 15, 1926.

AUL HANKE, 0E BOUND BROOK, NEW JERSEY.

urPE'n PLATE or A SET OF AEirrEIomL TEETH.

Application filed October so, 1925. Serial No. 65,798.

My invention relates to improvements in Sets or artificial teeth, particularly to the upper plates thereof, and it consists in the novel features hereinafter more fully described. v

I-leretoforethe main parts of such upper plates have been made of rubber, which allows a correct form of the mouth to be made, but which does not transmit thenormal thermal changes which are necessary for healthy tissue.

Some upper plates have also been made of gold castings, which transmit thermal changes well enough, but do not allow a perfect form of the mouth to be made, on account of the distortion and shrinkage, which occur therein during the cooling of. the casting.

One of the objects of my improvement is-to produce a perfected upper plate of a set of artificial teeth of such materials and construction that will allow a perfect form of the mouth to be made and will at the same time transmit the normal thermal changes.

Another object of my improvement is-to have said upper plate simple, durable, com.- paratively inexpensive and lighter than ordinary gold plates which cover both the palate and the periphery of the gum.

Other objects and advantages will hereinafter appear.

I attain these objects by the upper plate of a set of artificial teeth, one form of which is illustrated in the accompanying drawings or by any mechanical equivalent or obvious modification of the same.

In the drawings Fig. 1 is a plan view of my improved upper plate of a set of artificial teeth, which plate is shown as inverted.

Fig. 2 is a section on the line 2-2 of Fig. 1, showing the thickness of the parts as much exaggerated for the sake of clearness.

Fig. 3 is a View similar to Fig. 2 of said upper plate, but omitting the rubber or porcelain ridge and periphery of the plate with the teeth imbedded in said ridge, for the sake of clearness.

Like numerals refer to like parts throughout the several Views.

11 designates a lining of soft gold or platinum for the palatal side of my improved upper plate of a set of artificial teeth, which lining may be formed of pure softHsheet gold or platinum having a thick ne'ss, which is known in the art as-Noi'ii'ti, or near that size, and it includes a central part, a ridge lining and a periphery lining, as shown in Fig. 2. k

Thelining 11 is formed on a cast, which is made of artificial stone; the cast is omitted in the drawings.

The soft gold or platinum of the lining 11 allows a perfect form of the mouth to be made; but by itself it is not rigid enough for a plate.

I therefore provide a reinforcement 12 of rolled gold or platinum of sufficient thickness and rigidity, to render the reinforced plate portable and safe from distortion.

The reinforcement 12 may be connected to the-lining 11 by soldering, and it forms the lingual side of my improved upper plate of a set of artificial teeth.

To connect teeth to said plate, I provide a ridge 13 with a periphery 13, which may be made of rubber, porcelain or some similar material adapted to have teeth imbedded therein; the ridge 13 and periphery 13 may be made in one piece, as shown, and joined to the corresponding parts of said lining 11 by any method known in the art.

When porcelain is employed for the ridge 13, the reinforcement 12 must be made of platinum for obvious reasons, platinum being better able to withstand the high tem perature at which porcelain is baked.

To join the ridge 13 to and interlock it. with the reinforcement 12, I provide the latter with an upraised edge 14: at the sides and front thereof, as shown in Fig. 3, to overlap the inner edge 15 of the ridge 13, as shown in Figs. 1 and 2; the dotted line in Fig. 1 shows the said edge 15 of said ridge 13 as anchored under said edge 14 of the reinforcement 12.

By the above construction, the central or main part of my improved upper plate is made entirely of non-corrosive metal which permits normal thermal changes to be transmitted therethrough, and at the same time a correct form of the mouth is insured by making the palatal side 11 of said central part of the plate of pure soft gold or platinum.

The upraised edge 14: of the reinforcement 12, overlapping the inner edge 15 of the ridge 13, which is anchored thereunder,

insures the rigidity and durability of the structure of my improved upper plate of a set of artificial teeth.

The reinforcement 12 may also be of cast metal, if desired.

Other changes may also be made in the details of construction of my above described upper plate without departing from the main scope of my invention, and parts of my improvement may be used without other parts.

I do not, therefore, restrict myself to the details as shown in the drawings; but I in tend to include also all mechanical equivalents and obvious modifications of the same within the scope of my invention.

I claim as my invention and desire to secure by Letters Patent:

1. In an upper plate of a set of artificial teeth a thin lining of pure soft sheet metal on the palatal side of said plate, to allow a perfect form of the mouth to be made, and

a reinforcement of smooth rigid metal on the lingual side of said plate soldered to said lining, to render said plate portable and safe from distortion.

2. In an upper plate of a set of artificial teeth a thin lining of pure soft sheet metal, on the palatal side of said plate, to allow a perfect form of the month to be made, said lining including a central part, a ridge lining and a periphery lining, a reinforcement of smooth rigid metal on the lingual side of said plate soldered to said central part, an upraised edge on said reinforcement, a ridge of suitable material to have teeth imbedded therein covering said ridge lining, and a periphery made integrally with said ridge, covering said periphery lining, the inner edge of said ridge being overlapped by said upraised edge and anchored thereunder, thereby interlocking said ridge with said reinforcement.

PAUL HANKE. 

